I did end up getting the shockwave 26 prop and propshaft. It's a lot faster now, but doesn't seem to have the high-rpm scream it did, almost like the prop is keeping the motor from spinning as fast as it could. Not that I'm complaining, just wondering if there is more speed to be had that I'm missing. I think I might try and get a flexshaft from OSE too. The motor ujoint exploded today.